Pivot structure



May 6, 1930.

WITNESSE w. E. TRUMPLER PIVOT STRUCTURE Filed March 21, 192'? iNVENTOR W HiQmETwm EE" ATTORNEY great amplitude m y be ebtained- Patented May 6, 1930 UNITED :P Y l w L IAM n. mum-men, on NEW YORK, Y, .essien zeimb twn rmenousn nnncimm & .mnumerrnenve QQM ANY; "a

Q-Kromnon 9F :ennsxnvema I r vfori' smne'rn en Application-filed naicazi, 1927f$eria1 no. 177,024.

utilizable for any de ired pu p ee and as,

particular relation to stable arrangements by whieh pivotal or o eillaterymeveme tef In accordance. with my inve tiene meeh nical connection, comprising vresilient members disposed in interseeting planes and of great flexibility, interposedbetaveen relatively movable pants or. el m n wh reby firictiona'l iresistanee isrent'irely e imina ed.-

Fnrther in accordance Withmy inven i n, the aforesaid resilient membersare soplesigned that the axisozf rotation 01: oscillation of oneof the movable )PiL IISSOIiQlQMQLH'IS substantially eoincides with the extension. f

ca in which the planes a theireei-lien members intersect.

.. Inacconclanqe with one phase any -vent-i-on,:-the afonesiaid spaeed resilient mem- -bers support aide-fleeting or oseillating o nt- "er .eo-actlng with? suitable scale to ig-gate themagnitncle of an observed quantity, eondition, or thelike;

My invention relates to a {QiVLQt' .StIuCtnr-e ofthegeneral diameter dise o ed my Pi ing application, Serial N97- 5:9, 295yfi1QdmIlm 27,1925, 1a11d, inSDII respeetsisanimprowenient loverlthe disclosuneio f that-applination in that the deflecting =91 bending lee -si'1ient members are of greater stability-rand are subjected to" ilesslzstraing -whilej iniif hfl :same time, ermitting great-.1.amp1itn 1e of 1 movement .ofthe. aeiljatinely mey le part "iconneeted theretoq i My invention resides in th =9 apparatus of: the -ehara te h re nafter described and claimed.

' For an; illustration-efxsoine myinventionmay take, i'eiierenge is to bebad i-to th accompanying-dr w ng,inw eh; I "Frigliltes and Zanephn e e eya .strncted in aeeord nee nith-myianenaee;

Fig. 3 is a side elewatiollal-wiew of; appamains-Qfamedifiedierm;and.

. Fig.4: is a perspee ivewiew .eith annesstnitcztnl e o base A .ei; any-amiable ed-1' eent surf ces tegetihenfiaQTb, like I st p of isplting 'seteel,iph eephorebrenze,

mem er iitilizabile for aetuating anointer -6 termed .pr zfenably *intjegnai v@tJnerewith. The p n11 rfi,at.its-L:Enee end',1.ooaets With,

thenetq in .a-nyenitable manner;

th "disk .51 110 1311.6 Vmember 9 which may be ,pperated in any Suitable;rmanner snehffor example, as that disclosedwinvemy pending application --,s;ide Iloweyen, if "it eaeh'laegi e unequa the melt}; 4? .flaellongar tienand of" any u tabi e mean,

with.

1 n spaced ela i n h Hie members -way be ee nn el t th tendarl fi any si z tfi bl mann r, pr fi a l-y, hewewen, .i by.

fitting on end Q ezf saidmembers in a slotin a site d-a d 2 andw heneeldering the Th m mbers 1 sh nld :be a il'lighly we. eii ient material anal of such eheraeter that they may be :flexed with rreiati-yely .:1itb1e e.f-

.Or-d: nari=l y', hey'ehoniddee t'hin, webor the like; V V a Ea h of the ai resaiamemberswa at its d' i mewe iteeupipent is iipiaefera ly n eei ed and soldered in 1a vslot' dformed n a nodpr ingf projecting from ",aidisk or Pleas wee 51 6 immed inithe exgmplei'lillusereted, on fan-extension ilazio'fthe the purpo .013 oscilikaiiiingm: idefl t 1 the- Qinter 6, energy m rr b To thlisYend, in the.examplezillustramd; li k 8 1 See I -1 5 23, fi ed Manual, 19.27..-

the-device ,i-siat rest,;1the planes of the -1nembers 3; shonldrinterseet injsnbstantiaily i aastraight iline and it isabout ans linewthat -tion-a1 views rvespefl yelyi 10i apearatue :een-

the. moving system should inotate'.

the members 3 are id-imtical, one .with the I, de oftfhe aforesaid line should be the :eeee as the e gththe eesfi. on the other.

Each standard 2 serves as a support a m silien m mber ext ndiegaexees fl e bas e to "have 60 1. The combinationwith means for 'supportingsaid; member for os 'cillatorymovement comprisinga plurality of web-like, substantially '.U-shaped,1.resil ient 7 members disposed in-intersectingplanes and r65 egch freelyass uming positiohs -simulating arm of each resilient member 3 may be greater than the width of the shorter arm. This idea is illustrated in Figures 1 .and 2 wherein the length of any member 3, between 5 the support 2 and the aforesaid line, in which the planes of :the. members 13 intersect, is slightly greater than the length of said member 3 between said line and the-rod 4. Accordingly, the width ofthe longer arm. of saidfmember 3 is increased somewhat,

preferably adjacentthe support 2; "As a result, the'aXis of rotation is maintained. Substantially in coincidence with the aforesaid 4; The lattermay have torsional flexibility but should be of relatively great stiffness sidewisel f As illustrative'of another of the various forms=my invention may take, I have illustrated in Figures 3 and 4 a device generally the same'a's that of Figures 1 and 2:but em bodying U-shape resilient member-3a in lieu of the straight resilient members 3. The members 3a are duplicates of each other and each has both arms of theU lying in substan tially the'same plane. When assembled, the planes ofeach of the members 3a should intersect in substantially the same straight line, and it is about this line that the'pointer '35 6 should move. a I u g Although herein illustrated as embodied in adeflecting or indicating instrument, it is toibe understood that my'novel formof pivot structure is susceptible of other uses;- For 40 example, inmany arts, it is desirabletoeliminate, to the maximum extent, the friction de-' veloped between relatively movable parts, or

v to eliminatefrictional" surfacesentirely. The device herein j illustrated satisfies that "need.

: When utilized inlieu of a frictional bearing surface,- pointer '6 should; be'. eliminated. Moreover, under such Q11C11D1Sl3a11CeS,'1t is deother 'hand, shall beduplicatjes ofjeach other. 'Qrdlnarily, it is'desirable that three of the resilient members '3, 3a, or equivalents, be

if "utilized .and fthat'theybe' equidistantl'y spaced onthe base or supportingmember 1.

v5 5 However, it is to be understoodthata greater or less number of; such members may be pro- .:v1ded andthat they may be positionedon the .supporting'baseas desired.-

r I'claimas my invention:

a f nember, of

arcsof a circle upon movement of said de-x fiectlng member;

2. Deflecting mechanism comprising spaced resilient members ofsubstantially U-shape.

disposed in intersecting planes so as to cross each other, a deflecting-member carried by said resilient members, and means for imparting vibratory. movement to said deflecting member.. v k

3. Deflectin mechanism comprising spaced resilient mem ersof'sub'stantially U-shape disposed in intersecting planes, a deflecting member carried by said resillent members and having its, axis of rotation disposed substantially inthe line formed by said intersecting planes and means for imparting vibratory movement to said deflecting member.

41. The combination with a su porting equal distances from a'point thereon, indie vidual j resilient, web-like members of sub stantially U-shape carriedby individual legs member, of-relativelynon-flexible egs projectingtherefrom and spaced substantially.

and crossing each other in a linepassi ngsubstantially-through said point,'a member carried by said web-like members, and means for imparting oscillatory movement to said last namedmember. r

5. The combination witha supporting member, of relatively non-flexible legs pro jecting therefrom and spaced substantially e'qual'distances from a point thereon, each of said legs being slotted in a direction vezitending towards "said point, individual resilient,

web-like members received by the slotted portion; of each leg and disposed in'planes mtersecting in a "line passing substantlally through said point, and a member comprisweb-like members. 7

Jim an indicating pointerrarried by said i 6. A pivotal structure comprising the com bination-with spaced disc-like members disposed in overlying relation, of an odd number of adjacent resilient members disposed. ii in intersecting planes,'each of said; resilient members being secured at itsends to the re.

. p spective supporting members. 'slrable that-the disk 5 andthe rods 4, on the a one hand, and base land members 2, on the 7 The, combinat on with 1 a supporting memberkand' pivotally-movable deflecting element, of means for mounting said: deflect ing element on said supporting member cornprising, a plurality ofresilient membemdisposed in intersecting planes and crosslng each other in non-intersecting parallel planes, each I ofsaid resilient'members having substantiat ly theshape ofa hollow rectangle having one I of its sidesremoved, and each of said resile ientmembersbeingsecured-atone end to said supporting member and at the other endto t saiddeflectingelement.

8. A pivoted struc'ture eomprising the com- :binati'on with spaced: supporting and deflection indicating: members disposed in parallelplanes, of a plurality of resilient membersdis posed-1n intersecting planes, each Of $59M W silient members having stibstantially the shape of a hollow rectangle having one of its sides removed and each of said resilient members being secured at its ends to said supporting and deflection indicating members respectively.

In testimony whereof, I have hereunto sub+ scribed m 1927. 

